The survey of spectral angle mapper surveyor method efficiency in hyperspectral process for separation of colored-mélange ophiolite areas in the East of Mesina, Tabas (East of Birjand)

The lithologies of regions near the collision zone are different from another region. Mapping in these areas need extensive and exact studies and tools because of the variety of rocks، intensive uplift and clutter of units. Hyperspectral sensor is one of the most advanced tools that can do imaging from hundred of delicate and continuous bands in visible and infrared spectrums، so it can identify many of terrain despite spectral similarities and complications. In present study، as the first survey of hyperspectral data efficiency of hyperion sensor in Iran to separate the rock units، spectral based method of spectral angle mapper applied on hyperion image in Tabas، East of Birjand. Based on various laboratory- field studies، the lithology of study area can be separated into five general groups: (ophiolite series، metamorphic units، Oligo-Miocene volcanic units، limestone and flysch units). Igneous units in this area include Cretaceous ophiolite complex and young volcanic set (Oligo-Miocene، Pliocene-Quaternary). Dispersed outcrops of metamorphic rocks are seen in parts of ophiolitic series. In this region، for calculation of processing results accuracy rate، some scarred locations and points were sampled according to field surveys. Some of these samples were analyzed in microscopic thin section and by electron microprobe system، based on these works، criterion points for processing results accuracy rate، are evaluated. According to calculation، the user accuracy coefficient of spectral angle mapper method on hyperspectral data in hyprion sensor reach more than 64% in some parts of colored- melange in the East of Iran that is acceptable ratio in separation of blended complicated units.